Sukhoi PAK FA

Russia has been working steadily toward its own version of a fifth-generation aircraft with the Sukhoi PAK FA but industry insiders are saying the airplane is having developmental issues.  The Russian Defense Ministry have openly stated the PAK FA will be stealthy, supermaneuverable and have supercruise capability but the lack of evolutionary technology aboard the plane, the engines are the same as those aboard Russia's 4th generation Su-35, and the sharing of many of the same on-board systems  with the Su-35 also put the fifth-generation fighter designation in question.   The aircraft is intended to be the successor to the MiG-29 and Su-27 in the Russian Air Force.

Reports have surfaced of problems with the plane's engine performance, the reliability of its AESA radar, and of poor stealth engineering.  Compared to the US Air Force F-22 Raptor or the F-35 Lightning II, the PAK FA is significantly less stealthy than the US fighters.  The F-22 Raptor stealth systems holds a huge advantage over the Russian jet.

The PAK FA is designed to be a fast, high flying and stealthy air superiority fighter and it might hold a slight agility advantage over the F-22 with its three-dimensional thrust vectoring engines but the F-22 Raptor probably has the edge in terms of sensor and weapon integration as well as a much more advanced stealth configuration.

The PAK FA has a maximum speed at altitude of Mach 2.3 (2,440 km/h, 1,520 mph) and can Supercruise at Mach 1.6 (1,700 km/h, 1,060 mph)